Alarm-lock



(No Model.)

J. H. SMITH, G. THOMSON au H. A. GLOSSHH. ALARM LUCK.

No.7458,600. A.Patented Sept. 1, 1891.

"" III! m Hm @BWM/142 one o UNITED STATES PATENT OFFICE.

JOHN H. SMITH, GEORGE THOMSON, AND HORACE A. OLOSSER, OF FAIROHILD, VVISOONSIN.

ALARM-LOCK.

:SPECIFICATION forming part of Letters Patent No. 458,600, datedSeptember 1, 1891.,

Application tiled May 20, 1891.

T all whom, it may concern:

Be it known that we, JOHN H. SMITH, GEORGE THOMSON, and HORACE A.Cnossen, citizens of the United States, residing at Fairchild, in thecounty of Eau Olaire and State of ViScOn sin, have invented certain newand useful Improvements in Alarm-Locks; and we do hereby declare thatthe following is a full, clear, and exact description of the same,

to reference being had to the annexed drawings, making a part of thisspecification, and to the letters of reference marked thereon.

This invention relates to certain new and useful improvements inalarm-locks; and it I5 has for its objects, among others, to provide asimple, cheap, and durable lock of this character which cannot betampered with without sounding an alarm, and which shall be automatic inlocking, and provided, preferably,

2o with means for throwing open the cover when the same is unlocked.

Te provide a ratchet-alarm operated by the turning of the handle tounlock the device, the parts being constructed to unlock at z 5 acertain point only, while it will lock at any point. The handle isnormally held out of engagement with the spring-held locking-bar; butwhen the proper point is reached it is forced inward and engages aprojection on the bar and unlocks the device. The parts are inclosedwithin a suitable case and are cheaply constructed and easily assembled.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically dened by theappended claims.

The invention is clearly illustrated'in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which- Figure l is a section on the line W T ofFig. 2 with aportion of the side of the box broken away. Fig. 2 is asection on the line Y Y of Fig. l. Fig. 3 is a section on the line Z Zof Fig. l. Fig. 4 is atop plan showing the lock applied in position.

Like letters of reference indicate like parts throughout the severalviews in which they occur.

Referring now to the details of the drawings by letter, A designates aportion of a Serial No. 393,377. (No model.)

box, drawer, or any other receptacle to which it may be desired to applythe lock, and A is a portion of the lid or cover or other portion whichis supposed to be hinged and the lock applied at the side opposite thehinge. The side of the box is recessed or chambered, as shown at a, forthe reception of the case of the lock, as seen in Figs. 2 and 3.

O is the lock-case provided with a surround- 6o ing inwardly-extendingflange b, and upon the lower portion of this flange is supported anupright D, in which and in the front wall vof the case is journaled theshaft E, on which between the upright and the outer wall of the case issecured a ratchet-wheel F, with which is designed to engage aspring-pawl G, consisting of a strip of spring metal secured to thefiange h, as seen best in Fig. l, and its free end curved to engage theteeth of the .zo said ratchet-wheel. The upright D is provided near itslower end with a lug or extension c, as shown best in Fig. l, to whichis pivoted, as at d, the arm H, which is provided with a curved port-ionc between its ends, as I shown in Fig. l, to provide plenty of room forthe ratchet-wheel, and its free end is bent substantially at a rightangle to its length to form the lateral portion f, as seen best in Fig.

l, the end of the said lateral portion beingin 8o turn bent at an anglethereto, as shown at g in Fig. l. This lateral portion is located withina suitable box formed by the strip 7L, secured within the lock-case, asshown, to protect it and prevent tampering therewith. Secured to theupper flange i) is a strip I, the end of which nearest the free end ofthe said lateral portion is similarly bent, as shown at 't' in Fig. l,and between these two parts the catch J, secured to the under side ofthe cover 9o A', is designed to engage, the said catch passing throughan opening in the liange b,

as shown in Fig. 1, the end of the catch `heing preferably slightlycurved, as shown at j in Fig. l. The arm H is provided with a teat 7i',at a point between its ends, around which Vand around a similar teat Zon the side ange h ot the case a spring K is arranged and designed tonormally keep the said arm forced inward, but designed to yield when theroo arm is acted upon by the handle hereinafter described. The arm H isprovided with a lug or extension m, which works through acurved slot ain the front wall of the lock-case, as shown in Figs. l and 3, the saidlug extend ing at right angles to the arm.

M is a disk centrally pivoted on the shaft E and designed to be revolvedthereon. This disk covers the opening or slot in the front wall of thelock-case and carries the operating-handle L, which is connected withthe shaft E by the arm M as seen in Figs. l and 3. This. handle has asurrounding springactuated collar or sleeve N, which is normally heldoutward by the spring, but free to be pressed inward when desired tooperate the lock.

. The operation will be readily understood. The parts, as shown, arelocked; but when it is desired to unlock it the handle is turned aroundto the right, as indicated by arrow, and the turning of the handleturnsthe shaft E, which revolves the ratchet-wheel in contact with thespring -pawl and gives an alarm.

- When the handle .has reached the point opposite the lug on the arm H,the movable portion of the handle is pushed inward and engaged with thesaid lug, when a slight further movement of the handle will move thesaid arm in the direction of the arrow in Fig. 1 and unlock the parts bywithdrawing the lateral portion of the said arm away from the catch whenthe parts are unlocked. In order to throw the cover open when it isunlocked, we provide the spring-actuated arm O, which is arranged toslide in suitable guides 0 within the case, the spring serving to throwthe end of the arm against the cover and give it an impetus upward assoon as it is unlocked.

Vhat we claim as new isl. The combination, with the lock-case, theshaft, and the spring-actuated locking-arm, of

the ratchet-wheel on the shaft, the springpawl engaging therewith, andthe rotatable handle having the said shaft as its center and arranged toengage the locking-arm, as set forth.

2. The combinatiomwith the case, the shaft, and theratchet-wheel thereonand pawl, of the pivoted spring-actuated locking-arm having a lugworking in a slot in the front wall of the case, the rotatable disk, andthe handle carried thereby and having aportion designed to engage thelug on the looking-arm, as set forth.

3. The combination, with the lock-case, its shaft, and ratchet-Wheel andpawl, of the pivoted springactuated lockingarm having a lug working in aslot in the case, the disk on the shaft, the handle on the disk andprovided with a connection with the shaft, and a spring-actuated collaron the handle, sub stantially as and for the purpose specified.

4. The combination,with the case having a curved slot in its front wall,the upright, the shaft with its ratchet-wheel and pawl, the locking armpivoted to the upright, and a spring acting upon the arm, of a lug onthe arm working in the slot, a disk movable on the shaft, a handle onthe disk with an arm connected to the shaft, and a spring-actuatedmovable portion on the handle, as set forth.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

Witnesses:

O. A. FOSTER, WM. F. Hoon.

